Equipment decks need ample protection for their creatures so they arent blown out by removal, so a card that doubles as protection for both your equipment and your creatures gives you a huge edge
Whenever you put a card into your inkwell, you make an opponents character reckless
Having 3 toughness meant it couldnt be dealt with via Pyrite Spellbomb, it blocked Frogmite for free, and the flying made it difficult to block effectively
Bristly Bill, Spine Sower, from Outlaws of Thunder Junction , does both in just about the most standard way possible
This means that playing Ojutai can lead to a complete shutdown of your opponent's combat steps if you have a couple of Dragons on the battlefield
However, its easily outclassed in Pioneer due to its tight meta and Slashs reliance on getting a full board